Sökning: "air exchange efficiency"

Visar resultat 11 - 15 av 36 uppsatser innehållade orden air exchange efficiency.

  1. 11. Method development for the analysis of PFAS and neutral precursors in active and passive air samplers

    Master-uppsats, Örebro universitet/Institutionen för naturvetenskap och teknik

    Författare :Pascal Camoiras González; [2019]
    Nyckelord :;

    Sammanfattning : Poly- and perfluoroalkyl substances (PFAS) are a chemical class of global concern because of their persistence, toxicity and widespread presence in the environment. This work aimed to develop a robust and reliable method to analyse perfluorohexane sulfonic acid (PFHxS), perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS), as well as the neutral volatile PFOS precursors, namely perfluorooctane sulfonamides and perfluorooctane sulfonamidoethanols (FOSAs/FOSEs). LÄS MER

  3. 12. Indoor Air Pollution, Passive Ventilation Strategies and Thermal Comfort in Nepal

    Master-uppsats, Lunds universitet/Institutionen för arkitektur och byggd miljö

    Författare :Marianne Löwgren; [2019]
    Nyckelord :Energy poverty; Solid biomass fuels; Improved cooking stoves; Indoor air pollution; Carbon monoxide; Vernacular architecture; Passive ventilation; Air exchange rate; Indoor air quality; Thermal comfort; Operative temperature; Sustainable societal development; Social Sciences; Technology and Engineering;

    Sammanfattning : Indoor Air Pollution (IAP) resulting from indoor burning of solid biomass fuels in poorly ventilated kitchens is a severe health risk in parts of the world where energy poverty is prevalent. Passive ventilation, i.e. taking advantage of naturally induced airflow has been suggested as crucial in reducing IAP levels below safe limits. LÄS MER

  4. 13. Thermoeconomic analysis of LNG physical exergy use for electricity production in small-scale satellite regasification stations

    Magister-uppsats, Högskolan i Gävle/Energisystem och byggnadsteknik

    Författare :Dominykas Balciunas; [2019]
    Nyckelord :LNG; exergy; thermodynamics; economics; thermoeconomic analysis; small scale; satellite; regasification;

    Sammanfattning : Liquefied natural gas (LNG) cold utilization in small scale regasification stations is a novel topic in the industry, while such systems have been proven feasible in large scale LNG facilities. Cold recovery and utilization in LNG regasification facilities would increase the thermodynamic efficiency and reduce cold pollution. LÄS MER

  5. 14. AA-CAES physical modelling: integration of a 1D TES code and plant performance analysis

    Master-uppsats, Uppsala universitet/Tillämpad kärnfysik

    Författare :Luca Santo; [2018]
    Nyckelord :energy storage; balancing; grid; AA-CAES; CAES; peaks; energy scenarios; s-function; simulink; simscape; matlab; C ; TES; thermal energy storage; dumping; demand side management; power systems; turbine; compressor; cavern; CAS; compressed air; heat exchange;

    Sammanfattning : The focus of this thesis work was the development of an approachto couple a previosly existing Thermal Energy Storage (TES) modelwritten in C++ with a Simulink/Simscape plant model to simulate anAdvanced Adiabatic Compressed Air Energy Storage (AA-CAES) plant.After the creation and validation of such tool, the complete modelwas used to run simulations, with the aim of assessing the AA-CAESplant's performance under multiple patterns of charge anddischarge. LÄS MER

  7. 15. CARBONDIOXIDE FLUXES FROM A CONTROLLED BOREAL RIVER

    Master-uppsats, Mittuniversitetet/Avdelningen för ekoteknik och hållbart byggande

    Författare :FRANK ARTHUR; [2018]
    Nyckelord :Carbon dioxide fluxes; Gas transfer Velocity; Turbulence; Eddy covariance; Stream flow; Wind speed; Global Carbon cycle; Latent and sensible heat fluxes.;

    Sammanfattning : River, lakes and   streams account for more carbon dioxide emissions than all other freshwater   reservoirs together. However, there is still lack of knowledge of the   physical processes that control the efficiency of the air-water exchange of   CO2 in these aquatic systems. LÄS MER